Nikon D800 Technical Manual page 37

Using Diff raction to Combat Color Artifacts and Moiré
Although stopping down the
aperture increases the eff ects of
diff raction, sometimes resulting
in lower resolution (page 26
this same diff raction can also
be used to reduce color aliasing
and moiré. Adjust the aperture
setting according to the prior-
ity for the photo — maximum
resolution or minimum moiré.
f/5.6
f/11
page 26, 32 32),
f/8
f/16
35